Yeah...and to be overly clear documentation should specify that the hotswapped module is actually the standby one (SMM).
A thing I don't understand entirely is, considering what is the subject, what is reported on the Note:

If steps 1-4 are executed how will be possible to fall into what the note reports? the only thing I'm thinking of is that primary (or secondary) Flash on SMM will have a software version that doesn't match with secondary (or primary) on the very same SMM which, on the other hand, matches the one booted on the AMM...Am I wrong?